All 12 sections of the 0620 syllabus - explained, diagrammed and self-marked. Free, no login, works on any device.
Cambridge IGCSE Chemistry 0620 is twelve syllabus topics, studied in this order: 1 States of matter, 2 Atoms, elements and compounds, 3 Stoichiometry, 4 Electrochemistry, 5 Chemical energetics, 6 Chemical reactions, 7 Acids, bases and salts, 8 The Periodic Table, 9 Metals, 10 Chemistry of the environment, 11 Organic chemistry and 12 Experimental techniques and chemical analysis. Every one of them has its own revision page on this site, in Cambridge's own order.
All candidates take three components, and which three depends on the route your school enters you for. The route also sets the highest grade you can be awarded, so it is worth knowing which one you are on before you revise.
| Route | Papers you sit | Grades open to you | What it means |
|---|---|---|---|
| Core | Papers 1, 3 and 5 or 6 | grades C to G | For candidates who have studied the Core syllabus content, or who are expected to achieve a grade D or below. Paper 1 is multiple choice on the Core content only, Paper 3 is short-answer and structured questions on the Core content, and the practical paper is Paper 5 or Paper 6. |
| Extended | Papers 2, 4 and 5 or 6 | grades A* to G | For candidates who have studied the Extended syllabus content - the Core and the Supplement together - or who are expected to achieve a grade C or above. The same three components as the Core route, examined on the Core and Supplement content together. |
Paper 1 or Paper 2 is 30% of the qualification, Paper 3 or Paper 4 is 50%, and the practical paper is 20%.
| Paper | Time | Marks | What it tests |
|---|---|---|---|
| Paper 1 - Multiple Choice (Core) | 45 min | 40 marks | 40 four-option multiple-choice questions. Core content only. AO1 and AO2. |
| Paper 2 - Multiple Choice (Extended) | 45 min | 40 marks | 40 four-option multiple-choice questions. Core and Supplement content. AO1 and AO2. |
| Paper 3 - Theory (Core) | 1 h 15 min | 80 marks | Short-answer and structured questions on the Core content. AO1 and AO2. |
| Paper 4 - Theory (Extended) | 1 h 15 min | 80 marks | Short-answer and structured questions on the Core and Supplement content. AO1 and AO2. |
| Paper 5 / 6 - Practical | 1 h 15 min | 40 marks | Practical Test or Alternative to Practical, on the experimental skills in Section 4. AO3. |
Within the written papers the split is 63% AO1 to 37% AO2, in both the multiple-choice papers and the theory papers; the practical paper is 100% AO3. Every question on this site's IGCSE Chemistry pages is tagged AO1, AO2 or AO3, so you can see which one you are practising.
The full topic list, with every topic linked to its revision page, is on the IGCSE Chemistry syllabus page. Work through the areas below in order, or jump straight to what you need tonight.
Work through them in order or jump straight to what you need tonight. Each topic page teaches the content, then tests it.
This topic explains the properties of solids, liquids and gases in terms of how their particles are arranged and how they move. It covers changes of state, heating and co...
9 questions · 28 marks
Revise this topicThis topic covers what elements, compounds and mixtures are, the structure of the atom and how electrons are arranged, isotopes and relative atomic mass, and the three ma...
9 questions · 28 marks
Revise this topicStoichiometry is the arithmetic of chemistry. This topic covers formulae and balanced equations, relative atomic and molecular mass, the mole and the Avogadro constant, a...
9 questions · 28 marks
Revise this topicElectrolysis uses a direct current to decompose a molten or dissolved ionic compound into its elements. This topic covers the meaning of electrolyte, anode and cathode, t...
9 questions · 29 marks
Revise this topicChemical energetics is about the thermal energy transferred during a reaction. This topic covers exothermic and endothermic reactions, the sign of the enthalpy change, re...
8 questions · 25 marks
Revise this topicThis topic covers the difference between physical and chemical changes, the factors that affect the rate of a reaction and the collision theory that explains them, how re...
9 questions · 28 marks
Revise this topicThis topic covers what makes a substance an acid or a base, how acids behave towards metals, bases, carbonates and ammonium salts, and how the pH scale and indicators let...
8 questions · 25 marks
Revise this topicThe Periodic Table arranges the elements in order of increasing proton number, so that elements with similar properties fall into the same group. This topic covers how th...
9 questions · 27 marks
Revise this topicMetals conduct electricity, can be shaped, and are used for everything from wiring to aircraft. This topic covers their physical and chemical properties and the uses that...
10 questions · 30 marks
Revise this topicThis topic is the chemistry of the air and the water around us. It covers the tests for water and for its purity, the treatment of a water supply, the use of NPK fertilis...
9 questions · 30 marks
Revise this topicThis topic covers the language of organic chemistry - displayed and structural formulae, general formulae, functional groups and homologous series - and then applies it t...
9 questions · 30 marks
Revise this topicThis topic is the practical toolkit of chemistry. It covers choosing apparatus that measures time, temperature, mass and volume accurately, running an acid-base titration...
9 questions · 28 marks
Revise this topicKnowing the content and scoring marks are two different skills. These tools train the second one.
Every command word Cambridge uses, what it actually means, and what the examiner wants to see. Includes a trainer that shows you the difference between a 1-mark and a 2-mark answer to the same question.
OpenEvery question on the site in one place. Filter by topic, command word, marks or AO1/AO2, then build a set and mark yourself against the scheme.
OpenReal student answers that score badly, the exact reason each one loses marks, and the version that scores. This is where most marks are quietly thrown away.
OpenTen random questions. Get a score, a breakdown by area, and a focused follow-up set built from whatever you were weakest on.
OpenYour Learn / Practise / Test / Mastered status for every topic, saved in this browser. Shows exactly what is left.
OpenPick the time you actually have. The plan changes to fit it.
No packs to buy, no subscription and no login. Every topic, every question and every diagram is open to any student who needs it.
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